A cyclist rides past a billboard showing Cuban leader Fidel Castro Tuesday in Havana. Ailing leader Fidel Castro resigned as Cuba's president early Tuesday after nearly a half-century in power, saying he will not accept a new term when the newly elected parliament meets on Sunday. Billboard reads in Spanish: " Revolution: is modesty, disinterestedness, altruism, solidarity, heroism." (AP Photo/Javier Galeano) Javier Galeano